Lathe-chuck.



C. L FISHER.

LATHE CHUCK.

'APPLICATION FILED rms. |911.

L., l mmm m. 115, ma.

of an anchor jaw 12 which moves r ,as ar AoJarnon.'

CHARLES JOHN FISHER, @F mdhlttd FALLS, 'FR/.

narnia-canon.

Specication ci lettera Patent.

Patented dan. 15, 1916..

appucanon met retmary a, rari. serai no. maree.

Airdditional objects of .the invention willr appear in the following specication in which the preferred form of the invention is disclose ln the vdrawings similar reference characters denote similar parts in all the views, in whichf Figure 1 is a side elevation showing a chuck rovided with my improvement, parts being roken away to illustrate the construction; Y

Fig. 2 is a fragmentary sectional view of a chuck showing the jaw locked to the anchor block;

Fig. 3 is a view showing the construction of the anchor block, the locking jaw with its stem, 'the spring, the washer, and the locking barrel, the washer and the locking barrel being illustrated in section; and

Fig. 4 is a plan view of the jaw.

By referring to the drawings, it will be seen that the chuck has Aa body 5 on which jaws 6 are mounted, each of these jaws 6 being mounted in a manner which ll will now describe.

For each jaw, there are two sets of guideways 7 and 8, each jaw 6 having guide flanges 9 which extend in the guideways 8, the anchoring blocks 10 havin guides 11 which extend in the guideways The jaw 6 is secured to the anchor block 10 by means in a recess 13 in the `jaw 6. rlhe anchor jaw 12 is provided with teeth 14 which are adapted to mesh with teeth 15 in the anchor block 10. The anchor block 10 also has teeth 16 which mesh with a screw 17 journaled in bearings 18 in the body 5. With this construction it will be understood that when the teeth 1d on the locking jaw 12 mesh with the teeth 15 on the anchor block 10, as illustrated in Fig. 2 of the drawings, the jaw 6 will besecured for movinl with the anchor block 10, 1n a manner. we understood.

With the lathe chucks now in use there is delay 1n freeing the jaw for reversal or for thesubstitution ot another jaw, but, as will be seen by referring to Figs. l and 2 of the drawings, this is not the case with my construction, since the anchor jaw 12 may which extends from the locking jaw 12 in a guideway 20 in the jaw end of this stem 19 there is a locking barrel 21 which has a bayonet joint connection 22 with the jaw 6 sol the stem 19 and the locking jaw 12, and the locking barrel 21 may be rotated so that the bayonet joint 22 will lock the lock-ing barrel 21 in the position illustrated in Fig. 2 of the drawings. The locking barrel 21 is pivoted to the stem 19, as has been stated, a pivotal pin 23 having a head which prevents the movement of the locking barrel 21 away from the stem 19. This locking barrel 21 has notches 2t in which teeth 25 on a locking washer 26 are disposed, the said locking washer 26 extending around the stem 19. This locking washer 26 is engaged by a spring 27 which is disposed around the stem 19, this spring 27 havlng at one end a locking member 28 which is normally disposed in a recess 29 in the locking washer 26, the spring 27 at its other end having a terminal 30 which is disposed in a recess in a shoulder 31 of the guideway 20. By referring to the drawings, it will be seen that the spring 27 presses against the shoulder 31 of the guideway, so that when the bayonet joint 22 is free the` spring 27 will serve to raise the lockingbarrel 21, and with it the stem 19 and the anchor jaw 12, to free the teeth on the locking jaw from the teeth 15 on the anchor block 10.

When the in the guidebe. moved so that-:its teeth 142 will be out ot mesh with the teeth 15 by means of the stem 19 that the locking barrel' 21 may be pressed downwardly, and with it` lochng jaw 12 is freed in the manner described, the jaw 6, together with.

be reversed, or,

6. Fivoted to the 1 

